Janet Daby: The Secretary of State will be well aware of the historic failure of the Government to repay the £400 million International Military Services debt to Iran. My constituent Anousheh Ashouri is just one of the dual nationals being held hostage in Iran as diplomatic leverage. There is no doubt that this debt has caused their detainment; officials in Iran have confirmed that. What action is the Secretary of State, along with colleagues in the Foreign Office, going to take to resolve this shameful situation with urgency?